PythonTCPパケットインジェクション方式

私はあまりナンセンスを言うつもりはありません、誰もがコードを見るだけです！

#! /usr/bin/env python
import socket
import struct
def checksum(data):
s =0
n =len(data)%2for i inrange(0,len(data)-n,2):
s+=ord(data[i])+(ord(data[i+1])<<8)if n:
s+=ord(data[i+1])while(s    16):
s =(s &0xFFFF)+(s    16)
s =~s &0xffffreturn s
classip():
def __init__(self, source, destination):
self.version =4
self.ihl =5 # Internet Header Length
self.tos =0 # Type of Service
self.tl =0 # total length will be filled by kernel
self.id =54321
self.flags =0 # More fragments
self.offset =0
self.ttl =255
self.protocol = socket.IPPROTO_TCP
self.checksum =0 # will be filled by kernel
self.source = socket.inet_aton(source)
self.destination = socket.inet_aton(destination)
def pack(self):
ver_ihl =(self.version <<4)+ self.ihl
flags_offset =(self.flags <<13)+ self.offset
ip_header = struct.pack("!BBHHHBBH4s4s",
ver_ihl,
self.tos,
self.tl,
self.id,
flags_offset,
self.ttl,
self.protocol,
self.checksum,
self.source,
self.destination)return ip_header
classtcp():
def __init__(self, srcp, dstp):
self.srcp = srcp
self.dstp = dstp
self.seqn =0
self.ackn =0
self.offset =5 # Data offset: 5x4 =20 bytes
self.reserved =0
self.urg =0
self.ack =0
self.psh =1
self.rst =0
self.syn =0
self.fin =0
self.window = socket.htons(5840)
self.checksum =0
self.urgp =0
self.payload =""
def pack(self, source, destination):
data_offset =(self.offset <<4)+0
flags = self.fin +(self.syn <<1)+(self.rst <<2)+(self.psh <<3)+(self.ack <<4)+(self.urg <<5)
tcp_header = struct.pack("!HHLLBBHHH",
self.srcp,
self.dstp,
self.seqn,
self.ackn,
data_offset,
flags, 
self.window,
self.checksum,
self.urgp)
# pseudo header fields
source_ip = source
destination_ip = destination
reserved =0
protocol = socket.IPPROTO_TCP
total_length =len(tcp_header)+len(self.payload)
# Pseudo header
psh = struct.pack("!4s4sBBH",
source_ip,
destination_ip,
reserved,
protocol,
total_length)
psh = psh + tcp_header + self.payload
tcp_checksum =checksum(psh)
tcp_header = struct.pack("!HHLLBBH",
self.srcp,
self.dstp,
self.seqn,
self.ackn,
data_offset,
flags,
self.window)
tcp_header+= struct.pack("H", tcp_checksum)+ struct.pack("!H", self.urgp)return tcp_header
def test(source,site,data):
s = socket.socket(socket.AF_INET,
socket.SOCK_RAW,
socket.IPPROTO_RAW)
src_host=source
dest_host=socket.gethostbyname(site)
# IP Header
ipobj=ip(src_host,dest_host)
iph=ipobj.pack()
# TCP Header
tcpobj=tcp(1234,80)
tcpobj.data_length=len(data)
tcph=tcpobj.pack(ipobj.source,ipobj.destination)
# Injection
packet=iph+tcph+data
s.sendto(packet,(dest_host,80))
s.close()if __name__ =='__main__':test("10.0.0.1","www.baidu.com","ITS TEST")

補足知識：python3ソケットキャプチャ

コードを見てください！

import socket
s=socket.socket(socket.AF_INET,socket.SOCK_RAW,socket.IPPROTO_TCP)while True:print(s.recvfrom(65565))

上記のpythonTCPパケットインジェクションメソッドは、エディターによって共有されるすべてのコンテンツです。参照を提供したいと思います。